I can provide the exact file checklist or targeted troubleshooting steps based on your current setup. Share public link
If the receiver says it is updated but you are having issues, try the USB update method, as it sometimes bypasses checks that network updates miss. FAQ: TX-NR646 Updates in 2026 txnr646 firmware update 2021
: Format a USB drive to FAT/FAT32. Download the firmware from the official Onkyo support page I can provide the exact file checklist or